Joshua is a devoted public and oral historian.  He co-directs the NEH-funded oral history initiative Media and the Movement, which has interviewed more than 50 movement activists in the civil rights and Black Power movements who worked in media. Joshua has over ten years experience conducting oral interviews for his research and for the Southern Oral History Program at UNC-Chapel Hill.

Joshua is also deeply involved with museums and public history institutions.  He co-curated the gallery exhibit Soul Souvenirs: Bull City Soul Revival: Durham’s Musical Memories of the 1960s and 1970s in Durham, North Carolina in 2012, which he later helped turn into a website, Bull City Soul. Joshua served on the board of the Museum of Durham History from 2012 to 2015, and he currently serves on the advisory board of the Maryland Historical Society's Baltimore Uprising 2015 Archive project and is a member of the Library of Congress's Radio Preservation Task Force.

Joshua is available as a consultant for public history and oral history projects.